25.6.1 Macro Check_IMEI_MSC
29.0023GPPMobile Application Part (MAP) specificationRelease 17TS
This macro is used by the MSC to receive a request from the VLR, relay it to the EIR, and pass the result from the EIR back to the VLR.
Sheet 1: If the dialogue with the EIR drops back to a previous protocol version and the EIR returned an error, the MSC relays the error to the VLR in the MAP_CHECK_IMEI response. If the dialogue with the EIR failed, or the EIR returned a badly formed result, the MSC sends a System Failure error to the VLR in the MAP_CHECK_IMEI response.